Chemical evolution of magmas

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Research on chemical evolution of magmas is closely related to that described
in the previous section on "volatiles in magmas". This work has
focussed on investigation of the trace element evolution processes that
occur in magma chambers, such as fractional crystallization and magma mixing.
Microbeam analyses of melt inclusions have provided a level of detailed
observation of magmatic evolution that is typically not possible using whole
rock analyses, although whole rock compositions of erupted magma also provide
valuable insight.